Remove vestigial type parameter

src/main/java/org/syndicate_lang/actors/Actor.java

@@ -133,7 +133,7 @@ public class Actor extends ForkJoinTask<Void> {
         return super.toString() + "(" + this._name + ")";
     }
 
-    public<T> Ref ref(IEntity o) {
+    public Ref ref(IEntity o) {
         return new Ref(this, o);
     }